197982645840 has 960 divisors, whose sum is σ = 815047833600. Its totient is φ = 42999828480.

The previous prime is 197982645767. The next prime is 197982645851. The reversal of 197982645840 is 48546289791.

197982645840 is a `hidden beast` number, since 1 + 97 + 98 + 2 + 6 + 458 + 4 + 0 = 666.

197982645840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 429463210 + ... + 429463670.

It is an arithmetic number, because the mean of its divisors is an integer number (849008160).

Almost surely, 2^197982645840 is an apocalyptic number.

197982645840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197982645840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407523916800).

197982645840 is an abundant number, since it is smaller than the sum of its proper divisors (617065187760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197982645840 is a wasteful number, since it uses less digits than its factorization.

197982645840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 197982645840 in words is "one hundred ninety-seven billion, nine hundred eighty-two million, six hundred forty-five thousand, eight hundred forty".